81367103 has 2 divisors, whose sum is σ = 81367104. Its totient is φ = 81367102.

The previous prime is 81367081. The next prime is 81367109. The reversal of 81367103 is 30176318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81367103 - 2²⁴ = 64589887 is a prime.

It is a super-2 number, since 2×81367103² = 13241210901225218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81367109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40683551 + 40683552.

It is an arithmetic number, because the mean of its divisors is an integer number (40683552).

Almost surely, 2^81367103 is an apocalyptic number.

81367103 is a deficient number, since it is larger than the sum of its proper divisors (1).

81367103 is an equidigital number, since it uses as much as digits as its factorization.

81367103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 81367103 is about 9020.3715555403. The cubic root of 81367103 is about 433.3275331900.

The spelling of 81367103 in words is "eighty-one million, three hundred sixty-seven thousand, one hundred three".